/Engine/Source/Runtime/Engine/Classes/Sound/SoundSubmix.h
Start spectrum analysis of the audio output.
void StartSpectralAnalysis ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, EFFTSize FFTSize, EFFTPeakInterpolationMethod InterpolationMethod, EFFTWindowType WindowType, float HopSize, EAudioSpectrumType SpectrumType )